If you are looking for a way to run IE v6 on Windows 7 desktops, take a look at Symantec’s Endpoint Virtualization technologies. The software includes two different modules that are free of charge, including Workspace Virtualization administration and the Browser Selector tools. They are fairly simple to setup and flexible enough to isolate individual applications from the host Windows 7 OS.
Symantec Endpoint Virtualization
http://www.symantec.com/connect/endpoint-virtualization
Entry level pricing starts at $45 per node

You can see a video screencast that I recently did for Symantec here.